The top seed recovered from a set and a break down in a second round clash against fellow double Grand Slam winner Victoria Azarenka of Belarus.

With back-to-back titles at the US Open and the Australian Open, the 21-year-old from Japan had been trying to do something not even the greatest players in tennis history have done.

This is winning their first three Grand Slam singles title in a row.

The 42nd-ranked Siniakova, who is the reigning French Open and Wimbledon doubles champion, showed off her doubles credentials in the opening set, unsettling her opponent with sliced forehands and drop shots.

Breaking serve at 4-4, Siniakova clinched the first set in 44 minutes on her second set point as Osaka dumped a forehand into the net.

Osaka struggled to settle in the second set, going down a double break with a double fault.

Serving for her first win over a world number one at 5-2, Siniakova kept her nerve and won the match on Osaka’s 38th error.